Extruder motor gets hot.... Hello, I am using a metal extruder with direct drive. The extruder stepper motor gets hot while heating the hotend. Did anyone noticed similar. Setup similar to below link image. 3D-Printer-filament-Acrylic-Geeetech-I3-pro.jpg mod_embed_images_loadimage('a5a9c8048d4d89f7f59086cbcd8b7e1f', '/forum/thumbcache/dd9/751/106/f53/8ca/0ef/1bd/73e/d5e/e26/ad_800x400.png', 'http://g02.s.alicdn.com/kf/HTB1Rfk5IpXXXXXxXVXXq6xXFXXX1/3D-Printer-filament-Acrylic-Geeetech-I3-pro.jpg', 'https://reprap.org/forum/addon.php?4,module=embed_images,check_scaling=1,url=http%3A%2F%2Fg02.s.alicdn.com%2Fkf%2FHTB1Rfk5IpXXXXXxXVXXq6xXFXXX1%2F3D-Printer-filament-Acrylic-Geeetech-I3-pro.jpg', '', 569413, 800, 400, 'Loading image ...', false); 13DD_13.jpg mod_embed_images_loadimage('1d286ed3839b2d068a2bf611281a8901', '/forum/thumbcache/9ea/19f/29a/e60/492/4a0/163/a42/fea/623/2e_800x400.png', 'http://www.soonwell.com/ebay_file/App_pic/13DD_13.jpg', 'https://reprap.org/forum/addon.php?4,module=embed_images,check_scaling=1,url=http%3A%2F%2Fwww.soonwell.com%2Febay_file%2FApp_pic%2F13DD_13.jpg', '', 569413, 800, 400, 'Loading image ...', false); https://reprap.org/forum/read.php?4,569413,569413#msg-569413 Sat, 06 Jun 2026 18:31:19 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?4,569413,570844#msg-570844 Re: Extruder motor gets hot.... https://reprap.org/forum/read.php?4,569413,570844#msg-570844
I tried maintaining 2 - 3 mm gap between the heater block and metal extruder, but the the heating time is very much increased during PID autotune.

As the hotend barrel is directly connected to the base of metal extruder.... Anyone noticed..?]]> prashantdshinde Reprappers Thu, 15 Oct 2015 06:03:30 -0400 https://reprap.org/forum/read.php?4,569413,569906#msg-569906 Re: Extruder motor gets hot.... https://reprap.org/forum/read.php?4,569413,569906#msg-569906 Will try today...]]> prashantdshinde Reprappers Tue, 13 Oct 2015 03:06:15 -0400 https://reprap.org/forum/read.php?4,569413,569901#msg-569901 Re: Extruder motor gets hot.... https://reprap.org/forum/read.php?4,569413,569901#msg-569901 remove everything between heatsink and hotend. There must be no other metallic contact than by the heatbarrier.
If you have to fix the hotend to keep it from turning, you can use short cutoffs from PTFE tube and push at least two of them in the gap.
-Olaf]]> o_lampe Reprappers Tue, 13 Oct 2015 02:54:41 -0400 https://reprap.org/forum/read.php?4,569413,569659#msg-569659 Re: Extruder motor gets hot.... https://reprap.org/forum/read.php?4,569413,569659#msg-569659 prashantdshinde Reprappers Mon, 12 Oct 2015 13:37:47 -0400 https://reprap.org/forum/read.php?4,569413,569584#msg-569584 Re: Extruder motor gets hot.... https://reprap.org/forum/read.php?4,569413,569584#msg-569584 o_lampe Reprappers Mon, 12 Oct 2015 11:39:55 -0400 https://reprap.org/forum/read.php?4,569413,569546#msg-569546 Re: Extruder motor gets hot.... https://reprap.org/forum/read.php?4,569413,569546#msg-569546 It's not because of stepper driver of extruder motor. It is because of the metal contact of hotend with motor while running PID autotune. Did anyone came across such situations?]]> prashantdshinde Reprappers Mon, 12 Oct 2015 10:14:37 -0400 https://reprap.org/forum/read.php?4,569413,569426#msg-569426 Re: Extruder motor gets hot.... https://reprap.org/forum/read.php?4,569413,569426#msg-569426 Check the Vref of the stepper driver.
It might not match the motors max. phase current.
I have the same extruder design on my Prusa and it gets slightly warmer than the other steppers.
-Olaf]]> o_lampe Reprappers Mon, 12 Oct 2015 04:19:04 -0400 https://reprap.org/forum/read.php?4,569413,569413#msg-569413 Extruder motor gets hot.... https://reprap.org/forum/read.php?4,569413,569413#msg-569413
I am using a metal extruder with direct drive.

The extruder stepper motor gets hot while heating the hotend.

Did anyone noticed similar.

Setup similar to below link image.




]]> prashantdshinde Reprappers Mon, 12 Oct 2015 03:59:08 -0400